The water dosn't look bad but if you step into what looks like 12" of water you will sink another 3 or 4 feet in muck. I tossed a disc less than 10' from shore and after probing the bottom wit a stick decided I wasn't going in with out a safety rope.
Here are a few links, the first is to a DX Whippet, second is for a DX Griffin. The rim of the Whippet seems a little sharp, but looks possibly like the Griffin. If you have calipers you could measure it and check the specs.